Goodwill and Other Identifiable Intangible Assets (Identifiable Intangible Assets with Finite Lives) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,039	$ 2,010
Accumulated Amortization	(1,163)	(1,082)
Net	876	928
Aggregate amortization expense of identifiable intangible assets	121	132	$ 126
Estimated future amortization of identifiable intangible assets in 2017	120
Estimated future amortization of identifiable intangible assets in 2018	115
Estimated future amortization of identifiable intangible assets in 2019	100
Estimated future amortization of identifiable intangible assets in 2020	90
Estimated future amortization of identifiable intangible assets in 2021	85
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	587	572
Accumulated Amortization	(446)	(421)
Net	141	151
Customer-related intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,272	1,267
Accumulated Amortization	(618)	(574)
Net	654	693
Tradenames
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	142	132
Accumulated Amortization	(71)	(61)
Net	71	71
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	38	39
Accumulated Amortization	(28)	(26)
Net	$ 10	$ 13